ID 原文 译文
57268 提出了基于和树—深度确定性策略梯度( Sumtree DDPG) 的多路口智能交通信号控制算法，通过对交叉路口数据的实时观测，智能地调控交通信号周期时长、相位顺序以及相位持续时间，提高路口通行效率. A multi-intersection intelligent traffic signal control algorithm based on sumtree deep determin- istic policy gradient( Sumtree DDPG) is proposed. Through real-time observation of intersection data，the cycle length，phase sequence and phase duration of the traffic signal can be intelligently adjusted to im- prove the efficiency of intersections.
57269 同时，基于和树结构的经验数据存储模式提高采样效率，加速了算法收敛. Meanwhile，the empirical data storage mode based on sumtree struc- ture can improve the sampling efficiency and accelerate the algorithm convergence.
57270 仿真结果表明，在动态环境下，该算法在车辆排队长度、车辆等待时间、车辆平均速度等性能指标上均优于现有的固定配时方案和基于流量权重的配时算法. Compared with fixed signal timing and signal timing algorithm based on traffic flow weight，a simulation is carried out that the proposed algorithm obtains good performance in vehicle queue length，vehicle waiting time and vehicle av- erage speed in dynamic environment.
57271 为解决中继节点能量受限的问题及提高系统能量效率以实现可靠绿色通信，提出了基于无线携能传输( SWIPT) 技术的半双工中继量化转发( QF) 协作系统. Aiming to solve the problem of energy limitation of relay node and improve the energy efficien- cy of the system for achieving reliable green communication，the half-duplex relay quantize-and-forward ( QF) cooperative system is studied based on simultaneous wireless information and power transfer ( SWIPT) .
57272 首先，建立基于 SWIPT 的半双工中继 QF 协作系统模型，信源节点和目的节点由电源供电，中继节点通过 SWIPT 技术同时实现信息传输和能量收集;其次，在功率分割协议下，推导出基于 SWIPT 的 QF 协作的可达速率表达式，证明可达速率是关于功率分割因子的凸函数，并求解出最优功率分割因子以优化可达速率;然后，针对慢衰落信道，进一步分析了基于 SWIPT 的 QF 协作的预期速率;最后，理论分析与仿真结果表明，基于 SWIPT 的 QF 协作的可达速率或预期速率均明显优于传统放大转发和译码转发协作，并且基于 SWIPT 的 QF 协作在中继节点没有外部供电的情形下，能达到与传统 QF 协作相近的性能. Firstly，a SWIPT-based half-duplex relay QF cooperative system model is established. The source node and destination node are powered by external power. The relay node simultaneously imple- ments information transmission and energy harvesting by SWIPT. Then，for the power-splitting protocol， the achievable rate expression of the SWIPT-based QF cooperation is derived. It is proved that the achiev- able rate is a convex function with respect to the power-splitting factor，and the optimal power-splitting factor is obtained to maximize achievable rate. Furthermore，for slow fading channels，the expected rate of SWIPT-based QF cooperation is further analyzed. Finally，the analysis and simulation shows that the a- chievable rate or expected rate of SWIPT-based QF cooperation is obviously superior to that of traditional amplify-and-forward and decode-and-forward cooperation，and SWIPT-based QF cooperation achieves sim- ilar performance to that of traditional QF cooperation in the absence of external power supply for the re- lay.
57273 面向云服务可用性评价的多准则决策问题，提出了一种基于层次分析法( AHP) 的云服务可用性评价方法. To solve the problem of multi-criteria decision making for usability evaluation of cloud service， an evaluation method for cloud service usability based on analytic hierarchy process( AHP) is proposed.
57274 首先，梳理了近年来国际标准化组织和国内外学者针对云服务可用性研究的相关成果; Firstly，research achievements related to cloud service usability of international organizations for standardi- zation and scholars at home and abroad are sorted and analyzed.
57275 其次，结合云服务可用性的各种特性和子特性，以及企业的最佳实践，提出了度量方法; Then，measurements of characteristics and subcharacteristics are proposed considering the definitions of them and the industry best practices.
57276 最后，将 AHP 引入云服务可用性评价，保证评价结果的科学性. Finally，AHP is introduced into the evaluation process to ensure the scientificity of the evaluation result.
57277 实验结果表明，通过对影响云服务可用性的特性和子特性进行层次划分，以及对各类影响因素度量方法的合理设置，有效地提高了云服务可用性评价的标准化水平和准确性. Experiments show that the method can be used to improve the standard level and accuracy of usability e- valuation of cloud service by hierarchical division of characteristics /subcharacterisitics and relative weight setting.